/Engine/Source/Runtime/Engine/Public/GeomTools.h
Corrects the polygon winding to match bNegativeWinding Ie. If the vertex order doesn't match the winding, it is reversed Returns empty array of points if num points < 3
static void CorrectPolygonWinding ( [TArray](API\Runtime\Core\Containers\TArray)< FVector2D > & OutVertices, const [TArray](API\Runtime\Core\Containers\TArray)< FVector2D > & Vertices, const bool bNegativeWinding )